Despite being busy with his profession of soldiery, Brantome manages to find much more time for amorous dalliances with the ladies of the 16th-century French court than for battles. Unfortunately for him, his true love, Victoire, is beyond his reach most of the time. He more than compensates for this in the arms of others.

January, 1920. 350,000 French soldiers remain missing in action. Major Dellaplane tirelessly matches the dead and the wounded with families' descriptions. Honor and ethics drive him; he hates the idea of "the unknown soldier." Into his sector, looking for her husband, comes a haughty, politically connected Parisian, Madame Irène de Courtil. Brusquely, Dellaplane offers her 1/350,000th of his time, but as their paths cross and she sees his courage and resolve, feelings change. After he finds a surprising connection between her missing husband and a local teacher, Irène makes Dellaplane an offer. This man of action hesitates: has he missed his only chance?

Having fortuitously discovered a photograph in which Marthe embraces someone unknown, Étienne Dorsay becomes jealous and imagines various stratagems to identify the lover. In the meantime, he and his friends acquire a weekend house for a very low price.

On an otherwise normal day, Étienne, a happily married man and a good father, sees something that stops him dead in his tracks: a gorgeous woman in a billowing red dress. Long after she has left his vision, her memory continues to haunt his mind. He falls instantly in love with her and tries everything to get to know her better. Helping Étienne snare his elusive lady in red are his three bumbling buddies, which all have secret affairs and/or cheat on their wives.

Two distant cousins meet at a wedding banquet for an elderly couple. Over time, a close friendship develops between them, but their spouses begin to think that they are more than just friends.

When an American tourist is murdered in the south of France, the police must investigate. In this movie, the police inspector re-creates the girl's journeys through France until the murder is solved. Suspicions are narrowed down to four possible perpetrators early on, and flashbacks illuminate the roles each one played in the girl's vacation.